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(11) | EP 3 219 542 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | TRANSPORTATION VEHICLE |
| (57) To restrain a hoist shaft 133 and a bushing 134 of a hoist cylinder 10 from abrading.
A haulage vehicle having a vessel 3 pivotably provided relative to a vehicle, a hoist
cylinder 10 provided telescopically between the vessel 3 and the vehicle, a hydraulic
power source that supplies the host cylinder 10 with hydraulic oil, and a valve 16
provided between the hydraulic power source and the hoist cylinder 10 for controlling
the flow of hydraulic oil supplied to the hoist cylinder 10, wherein the haulage vehicle
is provided with a bushing 134 provided at one end portion of the hoist cylinder 10,
a hoist shaft 133 mounted in a through bore 134h of the bushing 134, a lubricant supplier
36 that supplies lubricant to a clearance between a surface of the hoist shaft 133
and an internal surface of the through bore 134h of the bushing 134, a seating detection
device 30 that detects whether the vessel 3 is seated on the vehicle or not, and a
controller 32 that when the vessel 3 is seated on the vehicle, controls the valve
16 to make the hoist cylinder 10 contract and also controls the lubricant supplier
36 to supply lubricant to the clearance.
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